Carburetor



Sept. 11, 1934. NALLINGER 1,973,353

CARBURETOR Filed Jan. 15, 1953 Jnvenior Patented Sept. 11, 1934 CARBURETOR Fritz Nallinger, Stuttgart, Germany, Aktiengesellschaft, Unterturkheim, Germany,

Daimler-Benz many assignor to Stuttgarta company of Ger- Application January 13, 1933, Serial No. 651,605 In Germany January 15, 1931 4 Claims.

This invention relates to a carburetor with throttle regulation and a device attached, for instance to the carburetor connecting rod, for momentarily accelerating the column of fuel flow- 5 ing to the carburetor nozzle when the carburetor throttle is opened. It consists essentially in this that the carburetor throttle and the accelerating device are connected together, for example, with play in the connecting rod in such a manner that first the accelerating device is operated and then the throttle is opened. In hitherto known oarburetors with accelerating devices for the fuel, these devices have been operated simultaneously with the throttle valve. It is found, however, that at the moment when the throttle valve opens in spite of the device, for example, an accelerating pump, the fuel column on account of its greater inertia as compared with the air could not be accelerated sufiiciently rapidly and a 20 weaker mixture was supplied at first.

According to the invention this drawback is avoided since shortly before the increase in the air supply, obtained by opening the carburetor throttle, the fuel required for the larger quantity of mixture is accelerated and thus the greater inertia of the fuel column is compensated.

In the accompanying drawing a constructional example for such a method is illustrated diagrammatically.

a is the carburetor in the float chamber of which an accelerating pump of any desired type is arranged at b. By the depression of a pump piston c or the like, the fuel is supplied to the nozzle under the additional pump pressure. The pump is actuated by a lever arm d which is moved by a further lever arm e either directly or indirectly, for example, through the intermediary of a spiral spring or the like. This latter lever is linked to a connecting rod 1 for the throttle valve 40 g, the operating lever h of which is connected to the rod 1 with play 1'.

When the rod f is drawn in the direction of the arrow by the accelerator pedal, first of all only the lever is carried with it while the lever h for the throttle valve on account of the play at i still remains at rest. The movement of the levers e and (I thus accelerates the fuel without any additional air being drawn in by the motor at first. Only after the rod 1 has been drawn 50 through the distance corresponding to the space i is the throttle g opened. By suitably dimensioning the play, the result can be obtained that even with the most rapid supply of gas the injected fuel passes the throttle .valve at the same time as the larger amount of air on account of pump. Consequently a poor mixture is no longer obtained when the throttle valve is opened.

What I claim is:

1. In a carburetor for internal combustion engines, a carburetor throttle, a nozzle for atomizing the fuel, a pump for accelerating the fuel fed to the nozzle, means for actuating the throttle, means for actuating the accelerating pump, both the said means being connected in such a manner that the means for actuating the throttle is operated after the operation of the means for actuating the accelerating pump.

2. In a carburetor for internal combustion engines, a carburetor throttle, a nozzle for atomizing the fuel, a pump for accelerating the fuel fed to the nozzle, means for actuating the throttle, means for actuating the accelerating pump and a connecting rod to which the first-mentioned means are connected with play and the second-mentioned means are connected without play in such a manner that when the rod is operated, first the lastmentioned and then the first-mentioned means are operated.

3. In a carburetor for internal combustion engines, a carburetor throttle, a nozzle for atomizing the fuel, a pump for accelerating the fuel fed to the nozzle, a lever for operating the throttle, a lever for operating the accelerating pump and a connecting rod to which the first-mentioned lever is connected with play and the secondmentioned lever is connected without play so that when the rod is displaced in one direction, first the accelerating pump and then the throttle is operated.

means are actuated.

FRITZ NALLINGER. 

